The AT89C2051-12SC is a popular 8-bit microcontroller integrated circuit (IC) manufactured by Atmel Corporation. It is a member of the 8051 family of microcontrollers and is widely used in a variety of applications due to its low cost and compatibility with the 8051 architecture.
Here are some key features of the AT89C2051-12SC:
1. 8-Bit Architecture: The IC uses an 8-bit CPU with a single accumulator and numerous general-purpose registers, making it suitable for a wide range of low-power applications.
2. Clock Frequency: The AT89C2051-12SC operates at a clock frequency of 12 MHz, enabling it to execute instructions quickly and efficiently.
3. Flash Memory: It is equipped with 2 kilobytes (2KB) of on-chip Flash program memory. This non-volatile memory provides the capability to store and run programs permanently, even after a power cycle.
4. RAM and Stack: The IC features 128 bytes of internal RAM, which allows temporary data storage during program execution. It also includes an 8-level deep hardware stack for subroutine and interrupt handling.
5. I/O Ports: The AT89C2051-12SC has 15 programmable input/output (I/O) pins, which can be assigned various functions, including digital input, digital output, and alternate functions like timers and serial communication.
6. Timers/Counters: It incorporates two 16-bit timer/counters, T0 and T1, which can be used for a variety of timing and counting applications, such as generating accurate time delays or frequency outputs.
7. Serial Communication: The IC supports serial communication through its integrated UART (Universal Asynchronous Receiver/Transmitter). This feature allows for easy interfacing with external devices, such as sensors or displays.
8. Interrupts: The AT89C2051-12SC supports both external and internal interrupts, allowing for efficient handling of events in real-time applications.
9. Power Management: It operates in a wide voltage range, typically between 2.7V and 6V, making it suitable for battery-powered and low-power applications. It also incorporates power-saving modes to conserve energy.
10. Programming Interface: The IC can be programmed using most standard In-Circuit Serial Programming (ISP) methods, making it easy to update or modify the program without removing the chip from the circuit.
The AT89C2051-12SC microcontroller is a versatile IC that provides a cost-effective solution for various applications, including home automation, industrial control systems, consumer electronics, and more. Its compact size, low power consumption, and extensive feature set make it a popular choice among embedded system designers.
